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M. MADSEN AIR PURIFIEH June 24,' 1930.

Filed Dec. 21

IN V ENTOR. Martzn Madsen BY flfl ATTORNEY Patented June 24, 1930 UNITED" srnrss PATENT orrlca mnrm llIADSEifT, or uon'rnamr rum, oamronm AIR PUBII'IEB Application llled December 21,-1926. Serial No. 156,081.

10 application, Fig. 1 is a top plan of my air purlfier. Fig. 2 is a vertical section on the line 2-2 of Fig. 1. Fig. 3 is an enlarged vertical section of an air outlet and cap therefor.

15 Referring to the drawings 5 are the vertical outside walls of the body of my purifier casing which is preferably circular and 16 havin attached to flange 12 to has a tapered bottom 6 with a port 7 there.- in. Attached to the top of body 5 is top gate 8 in which are a plurality of ports 9.

esting upon the central tions of plate 8 and attached thereto is t e overflow plate 10 in which are openin 11 that register with ports 9. Around t e ed e of plate 10 is a flange 12 and around eac opening are upwardly extending flanges 13. Caps 14 surround these flanges and are spaced from flanges 13 by lugs on the inner side of the caps which rest u on the top of the flanges. There are pre erably three lugs in each ca and the lower edges are preferably sawtootlled and are spaced from plate 10, as best shown in Fig. 3. By making the saw teeth deeper and caps 14 longer, In 15 could be omitted and the ca 5 woul rest on plate 10 and-be held space from flanges 13 at top and sides. A water supply pipe a regulating cock 17 thereon is connecte to flange 12 at a point below the tops of flanges 13. An overflow pipe 18' is connected to flange 12 at a point opposite pipe 16. A short splash plpe 19 may be revent the water when turned on from sp ashing over. By making flange 12 higher, pipe 19. maybe omitted.

Within body '5. and secured thereto near the top thereof is the main deflector whose top wall 20 preferably progects inwardly and downwardly to its unction; with the circular vertical body wall 21. To the lower edge of wall 21 is secured the outwardly and downwardly flaring skirt 22. Top .braces 23 are attached to the skirt and body. Bottom braces 24 are attached to the skirt and to a bottom cone shaped auxiliary deflector 25 and to the bottom'li. An internal top auxiliary deflector 26 is connected to wall 21 by braces 27 and held positioned above wall 20. A body 5 has an inlet pipe 28 which opens tangentially thereinto just below wall 20.

Operation My device has a large range of "uses. Assume that a workman is engaged in grinding work that produces a considerable amount of dust. One of my air purifiers would'be installed just above his work. A suction force fan would also be installed close thereto. with the exhaust port connected to inlet pipe 28 and properly 0 er-* ated. A suitable supply of water woul be permitted to pass out of pipe 16 which would cause the submergence of the bottoms of caps 15. Thereafter the dust laden air would be drawn in by the fan and forced into body, 5. The centrifu al force and the frictional engagement wit bod 5 would cause the heaviest articles to rep; down and pass out throng port 7. The partially freed air would pass up through'skirt 22,

wall 21 and impinge against deflector 26 which would cause more of the coarser particles of dust to fall. The air with the lighter particles would pass up around 26 and out through ports 9, thence down between 13 and 15 and out through the cap teeth and up to atmosphere. In its passage between 13 and 15 it would have to pass through a thin sheet of water which would remove the finer particles of dust, and dust .free air would be discharged. The .ebullition caused by the air passing through the water would prevent the dirt from settling and the same would be carried out through the overflow pipe.

Having described my invention I claim:

- An air purifier comprising a casing having a circular body provided with a perice forated top and a tapered bottom, said bottom having a port; a pipe secured to said body and opening thereinto tagentially; a main deflector within and secured to said body by its top wall, said main deflector com rising an inwardly and downwardly exten ing top wall, a vertical tubular'body secured at the top to said top wall, and a skirt secured to said tubular body at the bottom thereof and having an opening therethrough auxiliary deflectors, one above and the other below the openin through the main deflector and secure thereto and spacedtherefrom; a top plate having a plurality of orts therein, each ort bein sur- 1 rounded yan upstandin ange an restin; upon and supported by the perforated top of said circular bdy,said ports registering with the perforations of said top, said plate having an outer upstanding flange; caps surroundin the flan es of the ports of said plate an spaced rom said flanges, said caps having slitted lower edges; a water inlet pipe and overflow means se- 25 cured to said port Iilate flange.

In witness that claim the foregoin I have hereunto subscribed my name this gth day of December, 1926.

MARTIN MADSEN.

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